wol-soft/php-json-schema-model-generator

/**
 * Get a list of all properties which matched the requested pattern
 *
 * @param string $key The key of the pattern properties
 *
 * @return {{ returnTypeAnnotation }}
 *
 * @throws UnknownPatternPropertyException if pattern properties with an unknown key are requested
 */
public function getPatternProperties(string $key): array
{
    $hash = md5($key);

    if (!isset($this->_patternProperties[$hash])) {
        throw new UnknownPatternPropertyException("Tried to access unknown pattern properties with key $key");
    }

    return $this->_patternProperties[$hash];
}